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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






2. 45-60 days after breeding; re-breed as required






3. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood






4. Allows extension of penis without fibro-elastic penis






5. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






6. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






7. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






8. Important 'landmark' during palpation






9. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






10. Can survive ~7 days in cow. vast majority <48 hours






11. Superior genes are _______ to multiply






12. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






13. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






14. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






15. (LH) stimulates the Leydig cells to produce testosterone






16. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract






17. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






18. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






19. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






20. What about the sperm for a bull which has been castrated but still has testicles?






21. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






22. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






23. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)






24. 16-20 hours






25. Implies the amount of estrogen production






26. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)






27. Days which have decreasing daylight hours

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28. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off






29. Check feet and legs - look for masculine traits in build such as crest and muscling






30. 30-38 hours after estrus cycle begins






31. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






32. Animal which has been castrated after puberty






33. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract






34. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm






35. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






36. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %






37. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.






38. Provide nourishment for the developing sperm






39. Way to know everything is alright with the breeding male






40. 1-3 days






41. Failure to have both testis (gonads) descend






42. Larger the cow - more milk is produced; smaller the cow - less milk is produced






43. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






44. What makes the milk flow through the mammary glands?






45. Milk ~305 days - dry 60 days prior to calving






46. Male on one pin and female on other side






47. Urinary calculi.






48. Scar tissue plugs up chambers of udder






49. To remove/separate testicles from animal's body before animal reaches puberty






50. When are steers and heifers weaned from bottle feeding?